As greg b says they could be bits of other chanteys

Blow today and blow tomorrow
Blow me from this ship of sorrow

could be the couplet from BLOW BOYS BLOW:

CHORUS: Blow winds, and blow forever,
Blow me down the Congo River.

Was you ever down the Congo River?
Blow, boys, blow!
Where fever makes the white man shiver.
Blow, my bully boys, blow! CHORUS

A Yankee ship comes down the river,
Blow, boys, blow!
A Yankee ship with a Yankee skipper,
Blow, my bully boys, blow! CHORUS

How do you know she's a Yankee clipper;
Blow, boys, blow!
Her masts and yards they shine like silver.
Blow, my bully boys, blow! CHORUS

And how do you know she's a Yankee liner;
Blow, boys, blow!
By the Stars and Stripes streamin' out behind 'er.
Blow, my bully boys, blow! CHORUS

And how do you know she's a Yankee packet;
Blow, boys, blow!
'Cause her guns are all firin' a hell of a racket.
Blow, my bully boys, blow! CHORUS

And how do you know she's a Yankee cutter;
Blow, boys, blow!
By the blood and guts rollin' in her scupper.
Blow, my bully boys, blow! CHORUS

Who do you think is captain of her?
Blow, boys, blow!
Old Holy Joe, the darky lover.
Blow, my bully boys, blow! CHORUS

What do you think she's got for cargo?
Blow, boys, blow!
Why, "black sheep" that have run the embargo.
Blow, my bully boys, blow! CHORUS

What do you think they had for breakfast?
Blow, boys, blow!
The starboard side of an old sou-wester.
Blow, my bully boys, blow! CHORUS

What do you think they had for dinner?
Blow, boys, blow!
Belayin' pin pie and a trip through the wringer.
Blow, my bully boys, blow! CHORUS

What do you think they had for supper?
Blow, boys, blow!
Belayin' pin pie and a roll in the scupper!
Blow, my bully boys, blow! CHORUS

O, blow today and blow tomorrow,
Blow, boys, blow!
Blow me from this ship of sorrow.
Blow, my bully boys, blow! CHORUS